Home > Publications database > Bestimmung von Comptonprofilen an den Metall Wasserstoff Systemen VHX, VDX und PDHX |
Book/Report | FZJ-2018-01143 |
1978
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/17074
Report No.: Juel-1492
Abstract: Compton profiles for polycrystalline PdH$_{0.72}$, VD$_{0.77}$, VH$_{0.71}$, Pd and V have been determined by Compton scattering of 159 keV photons from a Te 123$^{m}$ source. The difference profiles before and after hydrogen loading are compared to different models for the electronic structure of the hydrides. It is shown that the Compton profile is a sensitive test of the accuracy of various model wave functions for the hydrides. In both palladiumand vanadium-hydride (deuteride) the anionic model (where it is assumed that the hydrogen forms a negative ion H in the hydride) does not describe the experimental results. The best agreement with the experimental data for PdH$_{0.72}$, VD$_{0.77}$ and VH$_{0.71}$ is obtained for a model which is based on band structure calculations for these hydrides and which takes into account that hydrogen-palladium or hydrogen-vanadium bonding states are created below the Fermi level by the introduction of hydrogen in the host lattice.
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